Speaker
Description
The design of the China Fusion Engineering Test Reactor (CFETR) has been updated since the end of 2018, the major and minor radius are enlarged to 7.2 m and 2.2 m. The CFETR magnet system consists of 16 TF coils, a eight-module CS coil, 6 PF coil and 18 CC coils. It is decided recently that a TF coil will be designed and fabricated from 2019 through 2024 by the Institute of Plasma Physics Chinese Academy of Sciences, which will produce a toroidal field of 6.5 T and a peak field above 14 T. A new circle-in-square Nb3Sn CICC conductor is being designed and the CFETR TF coil will be made of the CICC conductor without radial plates. For the preliminary design, the mechanical analysis shows that the von-Mises stress on the coil case of the inner leg and the shear stress on the ground insulation are over the limit, the reason is that the self-supporting strength of the present winding pack is not strong enough. Therefore, the design of the CFETR TF coil will be optimized by modifying the conductor design, the cross-section configuration of the winding pack and the coil case dimensions. Then the electromagnetic and mechanical analyses will be performed in order to verify the feasibility of the optimization design. The pretension, cool-down and Lorentz load will be applied for the 3-D analysis, and the orthotropic smeared material properties of the winding pack calculated with the finite element method will be used. In addition, 2-D analysis of the TF cross-section will also be performed.
